Dhcp Relay Page - McAfee SG310 Administration Manual

Network Setup menu options
DHCP Server
From the Network Setup menu, click DHCP Server. The status page appears.
1
Click the edit icon for the Interface you want to edit. The DHCP Addresses page appears for the Interface.
2
In the Add Reserved IP address pane, enter the following:
3
Enter the Hostname of the DHCP client.
a
Enter the MAC Address of the DHCP client.
b
Enter the reserved IP Address for the DHCP client.
c
Click Submit. The Status column of the address you reserved changes to Reserved in the Address
d
List pane.

DHCP Relay page

Use this page to configure a DHCP relay on the selected interface. A DHCP relay allows you to forward DHCP
requests to a DHCP server on another network. This allows you to use a single DHCP server to handle
multiple networks. The DHCP proxy allows the UTM Firewall appliance to forward DHCP requests from the
LAN to an external server for resolution. This allows both static and dynamic addresses to be given out on
the LAN just as running a DHCP server would.
Note: DHCP relay does not support Network Address Translation (NAT).
The UTM Firewall appliance is configured with the IP address of the DHCP Server. The appliance accepts
client DHCP Discover packets and relays them to the DHCP Server. The appliance returns information
received from the DHCP Server back to the client.
Configuring a DHCP relay
From the Network Setup menu, click DHCP Server. The DHCP Status page appears.
1
From the Type list, select Relay for the interface you want to configure. The DHCP Relay page appears
2
(Figure 134).
Figure 134 DHCP Server Relay page
The Enabled checkbox is selected by default.
3
In the Relay Server field, enter the IP address of a DHCP server located on another network.
4
Click Finish.
5
Editing a DHCP relay configuration
Use this procedure to edit a DHCP Relay configuration. You can enable or disable the relay, or change the IP
address of the DHCP Relay server.
If you want to change the Type to DHCP Server, you must delete the configuration first before reconfiguring
as a DHCP Server. See
From the Network Setup menu, click DHCP Server. The DHCP Server Configuration Status page
1
appears.
Click the edit icon for the Interface DHCP Relay configuration you want to edit. The DHCP Relay page
2
appears.
130 McAfee UTM Firewall 4.0.4 Administration Guide
Deleting a DHCP server or relay configuration.